Mark, Tim and Tom ask how we measure success. They draw on modern definitions of success and decide which ones are worthwhile.

This week Mark looks at success and how do people actually measure success? Is it measured by how many things they have? How many swimming certificates are on their walls? Whether or not they are Lionel Richie?

Some people appear to be doing well in the world, but are miserable. Other people don't have money, a good job or anything, but are happy. Is that, in fact, the true definition of success is to find contentment with whatever life brings a person?

Mark, Tim and Tom draw on modern definitions of success, and decide which ones are worthwhile. They look at successful people and those who have made a dog's dinner of life, to draw what conclusions they can.